Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A communication device, the communication device being included in a vehicle and connected to a plurality of other communication devices in the vehicle via a network, the plurality of other communication devices including a first other communication device and a second other communication device, the communication device comprising: a processor; and a memory including a program that, when executed, causes the processor to perform operations including: transmitting and receiving a message via the network; acquiring first state information on a state of the first other communication device and second state information on a state of the second other communication device; estimating a state of the vehicle based on the first state information and the second state information; selecting a filtering rule among a plurality of filtering rules based on the estimated state of the vehicle; and executing filtering processing for the message in accordance with the selected filtering rule, wherein when the estimated state of the vehicle is a transition state where the vehicle transitions from a first state to a second state, the plurality of filtering rules include a first filtering rule and a second filtering rule, the first filtering rule is selected when the plurality of other communication devices of the vehicle are in both the first state and the second state, the second filtering rule is selected when the plurality of other communication devices of the vehicle are all in the second state, and the vehicle switches from the transition state to the second state after a predetermined period.
This invention relates to a communication device for a vehicle that dynamically filters messages exchanged between multiple communication devices within the vehicle. The problem addressed is ensuring reliable and efficient communication during vehicle state transitions, such as switching between operational modes (e.g., ignition on/off, driving/parking). The communication device monitors the states of other connected devices in the vehicle, estimates the vehicle's overall state, and applies adaptive filtering rules to manage message traffic. When the vehicle is in a transition state (e.g., shifting from parked to driving), the device selects filtering rules based on the distribution of device states. If some devices are in the initial state and others in the target state, a first filtering rule is applied, prioritizing certain messages. Once all devices reach the target state, a second filtering rule is used, and the vehicle fully transitions after a set period. This ensures smooth communication during state changes, reducing latency and improving system stability. The invention is particularly useful in automotive networks where real-time data exchange is critical.
2. The communication device according to claim 1 , wherein the operations further include: acquiring plural types of state information, and the estimated state of the vehicle is based on any one of the plural types of the state information.
A communication device for vehicles is designed to enhance situational awareness by estimating the vehicle's state using multiple types of state information. The device collects various data inputs, such as sensor readings, vehicle dynamics, or environmental conditions, to determine the vehicle's operational state. The estimated state is derived from any one of these plural types of state information, allowing flexibility in data selection based on availability or reliability. This approach ensures accurate and adaptive state estimation, even if some data sources are unavailable or unreliable. The device may also transmit this estimated state to other vehicles or infrastructure to improve coordination and safety in autonomous or assisted driving scenarios. By leveraging diverse state information, the system enhances decision-making for collision avoidance, route planning, or traffic management. The invention addresses challenges in real-time vehicle state estimation, particularly in dynamic or uncertain environments, by providing a robust and flexible solution.
3. The communication device according to claim 1 , wherein a command for checking an operation state of the first other communication device is the first state information, the operation state of the first other communication device is estimated based on the command as the estimated state of the vehicle, and both a third filtering rule capable of extracting a command from the second other communication device and a fourth filtering rule corresponding to the operation state of the first other communication device are selected.
A communication device is designed to monitor and manage interactions between multiple communication devices in a vehicle network. The device addresses the challenge of efficiently processing and filtering state information from various sources to accurately determine the vehicle's operational state. The device receives state information from a first other communication device, which may include commands for checking the operation state of that device. The device estimates the vehicle's state based on these commands. Additionally, the device filters incoming state information from a second other communication device using a third filtering rule specifically designed to extract relevant commands. Simultaneously, it applies a fourth filtering rule tailored to the operation state of the first other communication device to further refine the data. This dual-filtering approach ensures that only the most pertinent and accurate state information is used to assess the vehicle's condition, improving reliability and reducing unnecessary processing. The system dynamically adapts its filtering rules based on the operational context, enhancing the precision of state estimation in real-time.
4. The communication device according to claim 1 , wherein the first filtering rule is selected for the predetermined period of time to allow temporary communication between the first other communication device and the second other communication device when the vehicle is in the transition state, such that a communication between the first other communication device and the second other communication device is recognized as an authorized communication when the first other communication device and the second other communication device are in different states.
This invention relates to vehicle communication systems, specifically addressing challenges in managing communication between devices in different operational states. The system involves a communication device that selectively filters communications between other devices based on predefined rules. The device monitors the state of a vehicle, such as transitioning between operational modes (e.g., ignition on/off, sleep/wake states), and applies a first filtering rule during these transitions. This rule temporarily permits communication between a first device and a second device, even if they are in different states, ensuring authorized communication during transitions. The filtering rule is dynamically selected for a predetermined period to allow this temporary communication, preventing unauthorized access while maintaining necessary inter-device communication during state changes. The system enhances security by restricting unauthorized communications while enabling essential interactions during vehicle state transitions. The invention is particularly useful in automotive networks where devices must communicate securely during dynamic operational changes.
5. The communication device according to claim 1 , wherein, after the predetermined period, communication between the first other communication device and the second other communication device is determined to be authorized if the first other communication device and the second other communication device are in a same state, and not authorized if the first other communication device and the second other communication device are in different states.
Wireless communication systems often require secure and efficient communication between devices, particularly in scenarios where unauthorized access must be prevented. A communication device is configured to manage communication between two other devices by monitoring their states over a predetermined period. The device determines whether communication between the two devices is authorized based on whether their states match after the period. If the states are the same, communication is authorized; if they differ, communication is blocked. This mechanism ensures that only devices in a synchronized state can communicate, enhancing security by preventing unauthorized interactions. The system may involve periodic state checks, where the communication device verifies the consistency of the states before allowing or denying communication. This approach is useful in networks where device authentication and state synchronization are critical, such as in IoT or industrial control systems. The solution provides a dynamic and adaptive method for controlling communication access based on real-time state verification.
6. A communication method comprising: transmitting and receiving a message in a network; acquiring first state information on a state of a first communication device included in a vehicle and a second state information on a state of a second communication device included in the vehicle; estimating a state of the vehicle based on the first state information and the second state information; selecting a filtering rule among a plurality of filtering rules based on the estimated state of the vehicle; and executing filtering processing for the message in accordance with the selected filtering rule, wherein when the estimated state of the vehicle is a transition state where the vehicle transitions from a first state to a second state, the plurality of filtering rules include a first filtering rule and a second filtering rule, the first filtering rule is selected when the plurality of other communication devices of the vehicle are in both the first state and the second state, the second filtering rule is selected when the plurality of other communication devices of the vehicle are all in the second state, and the vehicle switches from the transition state to the second state after a predetermined period.
This invention relates to vehicle communication systems, specifically addressing the challenge of managing message filtering in dynamic vehicular networks where devices transition between different operational states. The method involves transmitting and receiving messages within a network while monitoring the states of multiple communication devices within a vehicle. State information is acquired for at least two devices, and the vehicle's overall state is estimated based on this data. A filtering rule is then selected from a predefined set, tailored to the vehicle's current state. During transitions between states (e.g., from a stationary to a moving state), the system applies different filtering rules depending on whether other vehicle devices are in the initial, final, or both states. If all devices eventually reach the final state, the system switches to the corresponding filtering rule after a predetermined period. This ensures adaptive message filtering that aligns with the vehicle's operational context, improving communication efficiency and reliability. The approach is particularly useful in scenarios where vehicle devices may temporarily operate in mixed states, such as during startup or shutdown sequences.
7. A non-transitory computer-readable recording medium recording a program for causing a computer to execute a process, the process comprising: transmitting and receiving a message in a network; acquiring first state information on a state of a first communication device included in a vehicle and second state information on a state of a second communication device included in the vehicle; estimating a state of the vehicle based on the first state information and the second state information; selecting a filtering rule among a plurality of filtering rules based on the estimated state of the vehicle; and executing filtering processing for the message in accordance with the selected filtering rule, wherein when the estimated state of the vehicle is a transition state where the vehicle transitions from a first state to a second state, the plurality of filtering rules include a first filtering rule and a second filtering rule, the first filtering rule is selected when the plurality of other communication devices of the vehicle are in both the first state and the second state, the second filtering rule is selected when the plurality of other communication devices of the vehicle are all in the second state, and the vehicle switches from the transition state to the second state after a predetermined period.
This invention relates to vehicle communication systems, specifically managing message filtering in vehicular networks during state transitions. The problem addressed is ensuring reliable and efficient communication between devices within a vehicle, particularly when the vehicle transitions between operational states (e.g., parked, driving, or idle). The solution involves a computer program that monitors the states of multiple communication devices in the vehicle, estimates the vehicle's overall state based on this data, and dynamically applies filtering rules to incoming and outgoing messages. The system acquires state information from at least two communication devices in the vehicle, then estimates the vehicle's state by analyzing this data. Based on the estimated state, it selects an appropriate filtering rule from a predefined set. During transitions between states (e.g., from parked to driving), the system uses specialized rules: a first rule applies when some devices are in the initial state and others are in the new state, while a second rule applies once all devices have fully transitioned. The vehicle is considered to have completed the transition after a predetermined period, ensuring stability before applying the new filtering rule. This approach prevents communication disruptions during state changes, improving network reliability in vehicular environments.
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March 24, 2020
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